The four-color theorem — any map needs only 4 colors — was proved with computer assistance in 1976.

Antibiotics have saved millions of lives since their discovery.

Fact #1196 · Science

The microscope revealed microorganisms.

Fact #1554 · Science

The Müller-Lyer illusion makes lines of equal length appear different.

Fact #1464 · Science

In 1996, Dolly the sheep became the first cloned mammal from an adult cell.

Fact #1019 · Science

Particles can exist in multiple states until observed.

Fact #1770 · Science

Ants do not have lungs and breathe through small openings in their bodies.

Fact #351 · Science

Time moves more slowly in stronger gravitational fields.

Fact #1618 · Science

Volcanic lava can reach extremely high temperatures.

Fact #824 · Science